充气式机翼的通用设计方法

Research on A Universal Design Method for Inflatable Wings

根据柔性材料的承力特点,以采用翼型的内切圆系尽可能地逼近常规翼型为设计思想,提出了一套可用于对称和非对称翼型的充气式机翼的通用设计方法。以非对称翼型Eppler 398为例,通过编程求解并结合软件绘图,阐述了充气式机翼的设计成型过程,并对根据该设计方法实际加工出的充气式机翼模型进行了抗弯刚度实验。实验结果表明:模型与设计相当吻合,其抗弯刚度随其内部充气压力增大而增大,即只要内部压力足够大,这种充气式机翼完全可以具备很好的抗弯刚度以替代刚性机翼。试验结果验证了该设计方法的可行性,为充气翼飞机的设计奠定了机翼设计的基础。

According to the load - bearing characteristics of flexible materials, a universal design method for inflatable wings is proposed based on the design conception of approaching .the general airfoil to its serial inscribed circles, which is applicable to both symmetric and asymmetric airfoils. Taking the non -symmetrical airfoil Eppler 398 for example, the design process is illustrated through the combination of programming and graphics. An inflatable wing model manufactured on the basis of this design method accords very well with the blueprint, which shows that the design conception is correct. A bending stiffness experiment is carried out upon the inflatable wing model, the experimental results indicate that this kind of inflatable wing is good in bending stiffness and can be used to replace rigid wings as long as the internal pressure is large enough, thus the feasibility of the design method is verified.